Abstract
Twenty new 4,4′-dibenzoyl-1,1′-dibenzyl-1,1′-(decane-1,5-diyl)-piperazinium dihalides 5a-l and 1,1prime;-dibenzyl-1,1′-(decane-1,5-diyl) piperazinium dihydrochloride dihalides 6a-l were prepared and evaluated for their analgesic, sedative and anti-inflammatory activities. Structure-activity relationship studies indicated that the compounds 6c (Ar = 4-NO2C6H5) and 6k (Ar = 3-Me-C6H5) exhibited higher activities than others. Compared with the corresponding compounds 6k and 6l, the presence of benzoyl in the compound 5k and 5l exerted a contrary influence on the activities. 5h and 6h show the highest anti-inflammatory activity (59%, dose 20 mg/kg and 48%, dose 1 mg/kg) in the series 5 and 6, respectively.
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